feat(tools): make repo the canonical repo-identifier arg; name now an alias (#38)

Every caller (claude.ai connector, LLMs primed on gitea/GitHub) sends the repo
identifier as `repo`, but the 33 per-repo identifier tools advertised `name`.
The v0.2.8 shim aliased repo->name so it worked, yet the advertised inputSchema
still said `name` — a misleading contract, with the shim load-bearing.

- Flip all 33 identifier tools: schema property + required + struct field/tag
  from `name` to `repo`. A compliant `repo` caller now matches the struct
  directly; the shim is pure back-compat.
- normalizeAliases is now bidirectional (name<->repo), so legacy `name` callers
  still resolve, and repo_create / create_project_from_template — whose `name`
  means "name of the NEW repo", not an existing-repo id — keep `name` and still
  accept `repo`.
- `number`/`index` left as-is (out of scope; separate pre-existing quirk where
  pr_merge advertises `index` rather than `number`).
- Tests: schema-canonical assertion + flipped alias round-trip (explicit `repo`
  wins over `name`).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tools/file_delete.go

@@ -27,20 +27,20 @@ func (t *FileDelete) Descriptor() registry.ToolDescriptor {
 			"type":"object",
 			"properties":{
 				"owner":{"type":"string"},
-				"name":{"type":"string"},
+				"repo":{"type":"string"},
 				"path":{"type":"string"},
 				"branch":{"type":"string"},
 				"message":{"type":"string"},
 				"sha":{"type":"string"}
 			},
-			"required":["owner","name","path","branch","message","sha"]
+			"required":["owner","repo","path","branch","message","sha"]
 		}`),
 	}
 }
 
 type fileDeleteArgs struct {
 	Owner   string `json:"owner"`
-	Name    string `json:"name"`
+	Repo    string `json:"repo"`
 	Path    string `json:"path"`
 	Branch  string `json:"branch"`
 	Message string `json:"message"`
@@ -62,7 +62,7 @@ func (t *FileDelete) Call(ctx context.Context, raw json.RawMessage) (json.RawMes
 		return nil, fmt.Errorf("message is required: %w", gitea.ErrValidation)
 	}
 
-	result, err := t.c.DeleteFile(ctx, args.Owner, args.Name, args.Path, gitea.DeleteFileArgs{
+	result, err := t.c.DeleteFile(ctx, args.Owner, args.Repo, args.Path, gitea.DeleteFileArgs{
 		Branch:  args.Branch,
 		Message: args.Message,
 		Sha:     args.Sha,