ci: add Gitea CI workflows and release pipeline

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CHANGELOG.md

@@ -9,6 +9,41 @@ and this project adheres to [Conventional Commits](https://www.conventionalcommi
 
 Unreleased changes on the `development` branch.
 
+## [0.28.0] — 2026-08-03
+
+RISC-V encoder: full RV64IMAFDC instruction set with RVC compression, MOV
+pseudo-instruction, SB/global symbol references, ELF64 object emission, and
+ground-truth verification against `GOARCH=riscv64 go tool asm`.
+
+### Added
+
+- **RISC-V encoder** — RV64I, RV64M, RV64A, RV64F/D, FMA, CSR, JALR.
+- **MOV pseudo-instruction** — load, store, reg-to-reg, immediate, frame mapping.
+- **RVC compression** — 22 compressed instruction types (C.LDSP, C.SDSP, C.FLDSP,
+  C.FSDSP, C.ADDI, C.LI, C.LUI, C.ADDIW, C.MV, C.ADD, C.SUB, C.XOR, C.OR, C.AND,
+  C.SLLI, C.SRLI, C.SRAI, C.ANDI, C.BEQZ, C.BNEZ, C.J, C.JR).
+- **SB/global symbols** — `MOV $sym(SB)`, `MOV sym(SB)`, `MOV rd, sym(SB)`
+  encoded as AUIPC pairs with R_RISCV_PCREL_HI20/LO12 relocations.
+- **GLOBL/DATA** — data section layout in `AssembleFileRISCV`.
+- **ELF64 emission** — `gasm asm --format elf` produces EM_RISCV objects
+  (.text, .data, .symtab, .rela.text).
+- **`gasm verify --ground-truth`** — byte-exact comparison against
+  `GOARCH=riscv64 go tool asm`.
+- **`gasm verify --profile`** — function layout listing for RISC-V.
+- **CALL** — AUIPC + JALR pair encoding.
+
+### Fixed
+
+- Parser: bare-number offset before `(SP)` no longer misidentified as pseudo.
+- MOV: `MOV $sym(FP/SP), rd` now returns an explicit error instead of silent fallback.
+- RVC: C.LDSP/C.SDSP/FLDSP/FSDSP immediate encoding now matches Go toolchain
+  (bit-interleaved format).
+
+### Verified
+
+- 118 RISC-V tests, asm coverage 83.3%.
+- Ground-truth: C.LDSP, C.SDSP, C.FLDSP, C.FSDSP byte-exact vs Go toolchain.
+
 ## [0.27.0] — 2026-08-01
 
 Subprocess isolation for `--fuzz`: each function is fuzzed in its own child