delete old docs (#327)

* delete old docs

* new docs

docs/pages/migration/0.x_1.0.md

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+# From `0.x` to `1.0`
+
+Most of the config file is remained compatible, however to clean up the backends custom environment variables were moved from the root object to an `env` object.
+
+```yaml
+# Before
+remote:
+    type: b2
+    path: bucket:path/to/backup
+    key: some random encryption key
+    B2_ACCOUNT_ID: id
+    B2_ACCOUNT_KEY: key
+
+# After
+remote:
+    type: b2
+    path: bucket:path/to/backup
+    key: some random encryption key
+    env:
+      B2_ACCOUNT_ID: id
+      B2_ACCOUNT_KEY: key
+```
+
+Other than the config file there is a new `-v, --verbose` flag which shows the output of native commands, which are now hidden by default.

docs/pages/migration/1.4_1.5.md

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+# Migration from `1.4` to `1.5`
+
+## ⚠️ Important notes
+
+The way snapshots are referenced in the `restore` and `prune` commands has been changed. Before they were referenced by the path. Now every backup is tagged and those tags are then referenced in the cli. This means that when running restore and forget commands old backups are not taken into account anymore.
+
+## Config files
+
+- The config file now required to have a version number. This has to be added with `version: 2` at the root.
+- Hooks now optionally support `dir: /some/dir` in the [options object](https://pkg.go.dev/github.com/cupcakearmy/autorestic/internal#Hooks).
+- Docker volumes don't get prefixed with `volume:` anymore, rather you have to set the `type: volume` in the [location config](https://pkg.go.dev/github.com/cupcakearmy/autorestic/internal#Hooks).
+
+See detailed instructions below.
+
+## Config Version
+
+```yaml
+version: 2 # Added
+
+backends:
+  # ...
+```
+
+## Hooks
+
+Since `1.5` multiple sources for a location are possible.
+For this reason, while before hooks where executed in the folder of the source, now they are executed in the directory of the config `.autorestic.yaml`.
+
+You can overwrite this behavior with the new `dir` option in the hook section of the config.
+
+```yaml
+locations:
+  l1:
+    # ...
+    from: /foo/bar
+    hooks:
+      dir: /foo/bar
+      before: pwd
+```
+
+## Docker volumes
+
+The syntax with docker volumes has changed and needs to be adjusted.
+
+```yaml
+# Before
+locations:
+  foo:
+    from: volume:my-data
+```
+
+```yaml
+# After
+locations:
+  foo:
+    from: my-data
+    type: volume
+```
+
+## Tagging
+
+Autorestic changed the way backups are referenced. Before we took the paths as the identifying information. Now autorestic uses native restic tags to reference them. This means that old backups are not referenced. You can the old snapshots manually. An example can be shown below.
+
+```bash
+autorestic exec -va -- tag --add ar:location:LOCATION_NAME # Only if you have only one location
+```

docs/pages/migration/_meta.json

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+{
+  "0.x_1.0": "0.x → 1.0",
+  "1.4_1.5": "1.4 → 1.5"
+}