docs(rfd): Add RFD 061 for interactive config browser (#468)

Adds RFD 061, proposing an interactive configuration browser triggered
by a bare `--cfg` flag (no value). When invoked, the wizard presents a
filterable list of all `AppConfig` fields, lets the user search and
select one, then shows a type-appropriate inline prompt (confirm for
booleans, select for enums, text input for strings/integers, `$EDITOR`
for complex/multiline types).

The wizard produces a `Vec<KvAssignment>` — the same type that `--cfg
KEY=VALUE` parsing produces — so its output feeds directly into the
existing config pipeline. A confirmation step shows the collected values
and the equivalent CLI command (normalised to the simplest flag form via
alias reverse lookup and `CliRecord` reverse mapping from RFD 060),
teaching users the CLI syntax over time.

Implementation is planned in four phases: core loop and clap
integration, `$EDITOR` escape hatch, polished field selector with
documentation preview and visual markers, and finally equivalent-command
output. Phases 1 and 2 deliver a functional wizard; phases 3 and 4
polish the experience.

Signed-off-by: Jean Mertz <git@jeanmertz.com>

Author: JeanMertz

docs/.vitepress/rfd-summaries.json

@@ -232,11 +232,15 @@
     "summary": "Replace opaque tool output strings with typed content blocks (text, resource, question) mirroring MCP's CallToolResult model."
   },
   "059-shell-completions-and-man-pages.md": {
-    "hash": "791b583757910d0f1687a180f4ec49fd2d7876ffd695ceffc546bcf4ae5b9c7c",
+    "hash": "87620f0427690fa91fb954cf7cb95dd62392937a6410414f19a3a9fc0d07aca2",
     "summary": "Add `jp completions` and `jp manpage` subcommands using clap_complete and clap_mangen for shell integration."
   },
   "060-config-explain.md": {
     "hash": "cfa8458677aef01bb18793dab19605f67968b23ad00905a9d02dbd1bc7647bc0",
     "summary": "Global `--explain` flag traces config resolution through 9 layers, showing where each field value originates."
+  },
+  "061-interactive-config.md": {
+    "hash": "0b3bcc7ed9bbafde9e3599e05238320856c4e5711af34cc35dbade7d4d0ecbc8",
+    "summary": "Bare `--cfg` flag triggers interactive configuration browser for searching, inspecting, and editing config fields with type-appropriate prompts."
   }
 }