[mojo] Update the codebase to mojo v1.0.0

[forfudan]

No description provided.

[Copilot]

Pull request overview

Updates Decimo’s Mojo sources and Pixi environment configuration to track Mojo nightly, adapting code to recent language/stdlib API changes (borrowing qualifiers, unsafe memory routines, and Span API updates).

Changes:

• Retarget Pixi workspace to Mojo nightly (channel + dependency changes) and refresh lockfile.
• Update core numeric types/algorithms to new Mojo borrowing qualifiers (imm) and stdlib memory APIs (unsafe_memcpy, unsafe_memset_zero, pointer offset access).
• Minor TOML/CLI adjustments to align with nightly semantics (e.g., explicit .copy() in TOML getters, in-place string resize in CLI IO).

Reviewed changes

Copilot reviewed 22 out of 23 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/decimo/toml/parser.mojo	Updates TOML value container typing (Self), lifecycle traits, and returns copies from getters under new ownership rules.
src/decimo/str.mojo	Adjusts closure capture qualifiers from read to imm for nightly borrowing rules.
src/decimo/decimal128/special.mojo	Adds explicit Decimal128 import for nightly name/type resolution.
src/decimo/decimal128/exponential.mojo	Adds explicit Decimal128 import for nightly name/type resolution.
src/decimo/decimal128/decimal128.mojo	Updates Span import and field names (unsafe_ptr) to match nightly stdlib changes.
src/decimo/biguint/exponential.mojo	Switches to unsafe_memset_zero per nightly stdlib API.
src/decimo/biguint/biguint.mojo	Switches to unsafe_memcpy/unsafe_offset and updates local bindings per nightly syntax.
src/decimo/biguint/arithmetics.mojo	Broad imm migration + memory API updates; resize API changes (length/fill).
src/decimo/bigint10/bigint10.mojo	Updates ref binding syntax for nightly parsing rules.
src/decimo/bigint/bitwise.mojo	Replaces read with imm for in-place bitwise helpers.
src/decimo/bigint/bigint.mojo	Updates memcpy usage and pointer indexing to nightly pointer/offset conventions.
src/decimo/bigint/arithmetics.mojo	Updates memory calls and borrowing qualifiers to nightly conventions.
src/decimo/bigdecimal/trigonometric.mojo	Adds explicit BigUInt import needed under nightly.
src/decimo/bigdecimal/rounding.mojo	Adds explicit BigUInt import needed under nightly.
src/decimo/bigdecimal/exponential.mojo	Reorders/imports BigUInt and updates ref binding syntax for nightly.
src/decimo/bigdecimal/constants.mojo	Adds explicit BigUInt import needed under nightly.
src/decimo/bigdecimal/bigdecimal.mojo	Adds explicit BigUInt import and updates ref binding syntax for nightly.
src/decimo/bigdecimal/arithmetics.mojo	Adds explicit BigUInt/BigDecimal imports needed under nightly.
src/cli/calculator/io.mojo	Replaces substring rebuild with in-place String.resize when stripping trailing \r.
pixi.toml	Adds nightly channel; loosens mojo constraint; comments out argmojo dependency.
pixi.lock	Lockfile refresh reflecting nightly channel and updated package set.
benches/bigint/mojo/bench.mojo	Updates bench signatures/comments from read to imm.
benches/bigdecimal/mojo/bench.mojo	Updates bench signatures/comments from read to imm.

Comments suppressed due to low confidence (2)

src/decimo/biguint/arithmetics.mojo:2759

• Typo in comment: "imm" is a borrowing keyword, but here the sentence is about reading from the source list; this should say "read".

        # written before src[i+1] is imm.

src/decimo/biguint/arithmetics.mojo:2884

• Typo in comment: "imm" is a borrowing keyword, but this sentence is describing that the source element is read after the destination write; it should say "read".

    # before src[i+1] is imm.

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