feat: issue templates — bug, feature, push3-seed, refactor (#678)

Four templates for Codeberg issue creation:

- **Bug** — what, repro steps, affected files, acceptance criteria
- **Feature** — problem, solution, affected files (incl e2e tests), max 5 acceptance criteria
- **Push3 Seed** — strategy philosophy, behavior spec, pre-filled reference files + register mapping
- **Refactor** — what, approach, affected files, risks

All templates require affected files and acceptance criteria — the two things the dev-agent needs most. Push3 seed template has pre-filled deps (#667) and reference docs.

Gardener agent can enforce these on unstructured issues that come in without templates.

Co-authored-by: openhands <openhands@all-hands.dev>
Reviewed-on: https://codeberg.org/johba/harb/pulls/678
Reviewed-by: review_bot <review_bot@noreply.codeberg.org>

.codeberg/ISSUE_TEMPLATE/push3-seed.yaml

@@ -40,11 +40,14 @@ body:
     id: reference
     attributes:
       label: Reference files
+      description: Key files for understanding Push3 syntax and the transpiler.
       value: |
-        - Push3 instruction set: `tools/push3-transpiler/README.md`
-        - Existing seed: `tools/push3-transpiler/optimizer_v3.push3`
-        - Register mapping: r40→ci, r39→anchorShare, r38→anchorWidth, r37→discoveryDepth
-        - Inputs: 8 dyadic rational slots (0=percentageStaked, 1=averageTaxRate, 2-7=normalized indicators)
+        - Transpiler source: `tools/push3-transpiler/src/transpiler.ts` (defines all Push3 opcodes)
+        - Existing seed: `tools/push3-transpiler/optimizer_v3.push3` (current production optimizer)
+        - Evolution seed: `tools/push3-transpiler/optimizer_seed.push3` (simpler starting point)
+        - Push3 uses named bindings via `DYADIC.DEFINE` (e.g. `PERCENTAGESTAKED DYADIC.DEFINE`)
+        - Outputs: 4 values left on the DYADIC stack (top to bottom): ci, anchorShare, anchorWidth, discoveryDepth
+        - Inputs: 8 dyadic rational slots pushed onto stack (slot 0=percentageStaked on top, slot 1=averageTaxRate, 2-7=normalized indicators)
   - type: textarea
     id: deps
     attributes:

.codeberg/ISSUE_TEMPLATE/refactor.yaml

@@ -34,6 +34,12 @@ body:
         - [ ] CI green
     validations:
       required: true
+  - type: textarea
+    id: deps
+    attributes:
+      label: Dependencies
+      description: Issues that must be merged first. Leave empty if none.
+      placeholder: "- #NNN (reason)"
   - type: textarea
     id: risks
     attributes: