Re-levelization: move non-docs content, rename content→docs

For better URLs, the content folder has been renamed 'docs' and all
other files have been moved up a level. Also, non-docs images have been
moved to the static folder at the top level where they belong.

Many relative paths had to be fixed to make this work.

docs/references/http-websocket-apis/admin-api-methods/peer-management-methods/connect.md

@@ -104,4 +104,4 @@ The response follows the [standard format][], with a successful result containin
 - Cannot connect in stand-alone mode - Network-related commands are disabled in stand-alone mode.
 - `reportingUnsupported` - ([Reporting Mode][] servers only) This method is not available in Reporting Mode.
 
-{% raw-partial file="/_snippets/common-links.md" /%}
+{% raw-partial file="/docs/_snippets/common-links.md" /%}

docs/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_add.md

@@ -128,7 +128,7 @@ If there was not a previous entry for the same [node public key][], the `result`
 
 If the `previous` field is provided, it shows the previous status of this peer reservation, with the following fields:
 
-{% partial file="/_snippets/peer_reservation_object.md" /%}
+{% partial file="/docs/_snippets/peer_reservation_object.md" /%}
 
 
 
@@ -139,4 +139,4 @@ If the `previous` field is provided, it shows the previous status of this peer r
 - `publicMalformed` - The `public_key` field of the request is not valid. It must be a valid node public key in [base58][] format.
 - `reportingUnsupported` - ([Reporting Mode][] servers only) This method is not available in Reporting Mode.
 
-{% raw-partial file="/_snippets/common-links.md" /%}
+{% raw-partial file="/docs/_snippets/common-links.md" /%}

docs/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_del.md

@@ -125,7 +125,7 @@ The response follows the [standard format][], with a successful result containin
 
 If the `previous` field is provided, it shows the previous status of this peer reservation, with the following fields:
 
-{% partial file="/_snippets/peer_reservation_object.md" /%}
+{% partial file="/docs/_snippets/peer_reservation_object.md" /%}
 
 
 ### Possible Errors
@@ -135,4 +135,4 @@ If the `previous` field is provided, it shows the previous status of this peer r
 - `publicMalformed` - The `public_key` field of the request is not valid. It must be a valid node public key in [base58][] format.
 - `reportingUnsupported` - ([Reporting Mode][] servers only) This method is not available in Reporting Mode.
 
-{% raw-partial file="/_snippets/common-links.md" /%}
+{% raw-partial file="/docs/_snippets/common-links.md" /%}

docs/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_list.md

@@ -129,7 +129,7 @@ The response follows the [standard format][], with a successful result containin
 
 Each member of the `reservations` array is a JSON object describing one [peer reservation][]. This object has the following fields:
 
-{% partial file="/_snippets/peer_reservation_object.md" /%}
+{% partial file="/docs/_snippets/peer_reservation_object.md" /%}
 
 
 ### Possible Errors
@@ -137,4 +137,4 @@ Each member of the `reservations` array is a JSON object describing one [peer re
 - Any of the [universal error types][].
 - `reportingUnsupported` - ([Reporting Mode][] servers only) This method is not available in Reporting Mode.
 
-{% raw-partial file="/_snippets/common-links.md" /%}
+{% raw-partial file="/docs/_snippets/common-links.md" /%}

docs/references/http-websocket-apis/admin-api-methods/peer-management-methods/peers.md

@@ -419,4 +419,4 @@ The `metrics` object contains the following fields:
 - Any of the [universal error types][].
 - `reportingUnsupported` - ([Reporting Mode][] servers only) This method is not available in Reporting Mode.
 
-{% raw-partial file="/_snippets/common-links.md" /%}
+{% raw-partial file="/docs/_snippets/common-links.md" /%}