Fix lint issues in report.compare_performance.R - rename variables to avoid object_overwrite_linter warnings

[Copilot]

Fixed all object_overwrite_linter warnings in R/report.compare_performance.R by renaming variables that conflicted with exported objects from base R packages.

Problem

The development version of lintr was flagging 14 object_overwrite_linter warnings in this file:

• Variables named table conflicted with base::table()
• Variables named text conflicted with graphics::text()

Solution

Renamed problematic variables following established codebase patterns:

• table → result_table
• text → result_text

Functions Updated

• report.compare_performance()
• report_table.compare_performance()
• report_statistics.compare_performance()
• report_parameters.compare_performance()
• report_text.compare_performance()

Validation

Before: 14 object_overwrite_linter warnings
After: 0 lint issues found ✅

All functionality remains identical - comprehensive testing confirms no regressions:

library(report)
library(performance)

m1 <- lm(Sepal.Length ~ Petal.Length * Species, data = iris)
m2 <- lm(Sepal.Length ~ Petal.Length + Species, data = iris)  
m3 <- lm(Sepal.Length ~ Petal.Length, data = iris)

x <- performance::compare_performance(m1, m2, m3)
report(x)
#> We compared three models; lm (R2 = 0.84, adj. R2 = 0.83, AIC = 106.77, BIC =
#> 127.84, RMSE = 0.33, Sigma = 0.34), lm (R2 = 0.84, adj. R2 = 0.83, AIC =
#> 106.23, BIC = 121.29, RMSE = 0.33, Sigma = 0.34) and lm (R2 = 0.76, adj. R2 =
#> 0.76, AIC = 160.04, BIC = 169.07, RMSE = 0.40, Sigma = 0.41).

Fixes #553.

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