Added rorm-lib from main branch of rorm

Author: myOmikron

.gitignore

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+.idea/
+target/
+Cargo.lock

Cargo.toml

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+[package]
+name = "rorm-lib"
+version = "0.2.0"
+edition = "2021"
+keywords = ["database", "library"]
+authors = ["myOmikron <git@omikron.dev>"]
+categories = ["database", "development-tools.categories.ffi"]
+repository = "https://github.com/myOmikron/drorm"
+homepage = "https://rorm.rs"
+documentation = "https://docs.rorm.rs"
+license = "MIT"
+description = "The FFI bindings to C."
+
+[lib]
+name = "rorm"
+crate-type = ["staticlib", "cdylib"]
+
+[dependencies]
+rorm-db = { version = "~0.2", path = "../rorm-db" }
+
+# Runtime to execute the async context in
+tokio = { version = "^1.21" }
+
+# Async wrapper
+futures = { version = "^0.3" }
+
+# SQLX is only needed for error unwrapping
+sqlx = { version = "^0.6" }
+
+# Date and time library
+chrono = { version = "^0.4" }
+
+[features]
+default = [
+    "rorm-db/tokio-rustls",
+    "tokio/rt-multi-thread",
+]

README.md

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+# rorm-lib
+
+`rorm-lib` provides FFI bindings for `rorm-db`.
+
+With the help of this crate, it is possible for other languages to use the orm.
+
+To provide a similar experience as `rorm` for users, it is required to build 
+an additional layer upon this binding as well as an interface for `rorm-cli`.

src/errors.rs

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+use crate::FFIString;
+
+/**
+Representation of all error codes.
+ */
+#[repr(C)]
+#[derive(Debug)]
+pub enum Error<'a> {
+    /// Everything's fine, nothing to worry about.
+    NoError,
+    /// Runtime was destroyed or never created and can therefore not be accessed.
+    MissingRuntimeError,
+    /// An error occurred while getting or accessing the runtime.
+    RuntimeError(FFIString<'a>),
+    /// An error occurred while trying to convert a FFIString into a &str due to invalid content
+    InvalidStringError,
+    /// Configuration error
+    ConfigurationError(FFIString<'a>),
+    /// Database error
+    DatabaseError(FFIString<'a>),
+    /// There are no rows left in the stream
+    NoRowsLeftInStream,
+    /// Column could not be converted in the given type
+    ColumnDecodeError,
+    /// Column was not found in row
+    ColumnNotFoundError,
+    /// The index in the row was out of bounds
+    ColumnIndexOutOfBoundsError,
+    /// The provided date could not be parsed
+    InvalidDateError,
+    /// The provided time could not be parsed
+    InvalidTimeError,
+    /// The provided datetime could not be parsed
+    InvalidDateTimeError,
+}