refactor(swap): rename imported .md files to md- prefix for swap mechanism

Restore the canary file naming convention that swap_sources.py expects:
the imported MyST pages now live as docs/<dir>/md-<name>.md alongside
the existing docs/<dir>/<name>.rst, so swap_sources.py --swap can rename
them into place at build time.

- 254 .md files renamed (every page with a matching .rst counterpart)
- 2 MyST-only pages left at their final names (no .rst exists, no swap
  needed): docs/copyright.md, docs/automation/terraform/terraformvyos.md

All 114 stems listed in docs/_swap.txt now have a corresponding
md-<name>.md source file ready to swap in.

🤖 Generated by [robots](https://vyos.io)

1 files changed, 59 insertions, 0 deletions

diff --git a/docs/md-coverage.md b/docs/md-coverage.md
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index 00000000..fff0dc4e
--- /dev/null
+++ b/docs/md-coverage.md
@@ -0,0 +1,59 @@
+---
+lastproofread: '2025-11-14'
+---
+
+# Coverage
+
+Overview over all commands that are documented in the
+`.. cfgcmd::` or `.. opcmd::` directives.
+
+The build process takes all XML definition files
+from the [vyos-1x](https://github.com/vyos/vyos-1x) repository and a
+periodical export of all VyOS commands and extracts each leaf command, or
+executable command.
+The script compares only the fixed part of a command.
+All variables and values are removed and the string of the commands
+are compared.
+
+For example, take the following two commands:
+
+- documentation: `interfaces ethernet <interface> address
+      <address | dhcp | dhcpv6>`
+- xml: `interfaces ethernet <ethernet> address <address>`
+- VyOS: `interfaces ethernet <text> address <value>`
+
+**There are 3 kinds of issues with commands in the following tables:**
+
+`Not documented yet`
+
+- An XML command is not found in `.. cfgcmd::` or `.. opcmd::` directives.
+- The command should be documented.
+
+`Nothing found in XML Definitions`
+
+- `.. cfgcmd::` or `.. opcmd::` The command is not found in the XML
+  definition.
+- The command location may have changed in the XML definition, the feature
+  is no longer supported in VyOS, or there is a typo in the command.
+
+`Nothing found in VyOS`
+
+- `.. cfgcmd::` or `.. opcmd::` The command is not found in VyOS
+  documentation or the XML definition.
+- The command location may have changed in the XML definition, the feature
+  is no longer supported in VyOS, or there is a typo in the command.
+
+The final list of commands are shown in
+the following two tables:
+
+## Configuration Commands
+
+```{cfgcmdlist}
+:show-coverage:
+```
+
+## Operational Commands
+
+```{opcmdlist}
+:show-coverage:
+```
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