chore(release-please): drop per-plugin release-as pins after the v4.0.0 cut

The v4.0.0 marketplace release shipped with all six plugins pinned to 1.0.0.
Now that those tags exist, remove the `release-as: "1.0.0"` pins so future
feat / fix / refactor commits drive natural semver per plugin (feat -> minor,
fix -> patch). The marketplace continues on its own track from 4.0.0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: blafourcade

release-please-config.json

@@ -25,7 +25,6 @@
     },
     "plugins/aidd-context": {
       "package-name": "aidd-context",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",
@@ -36,7 +35,6 @@
     },
     "plugins/aidd-dev": {
       "package-name": "aidd-dev",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",
@@ -47,7 +45,6 @@
     },
     "plugins/aidd-vcs": {
       "package-name": "aidd-vcs",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",
@@ -58,7 +55,6 @@
     },
     "plugins/aidd-pm": {
       "package-name": "aidd-pm",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",
@@ -69,7 +65,6 @@
     },
     "plugins/aidd-orchestrator": {
       "package-name": "aidd-orchestrator",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",
@@ -80,7 +75,6 @@
     },
     "plugins/aidd-refine": {
       "package-name": "aidd-refine",
-      "release-as": "1.0.0",
       "extra-files": [
         {
           "type": "json",